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Finding the Fourth Proportional to 1,781.82, 2,672.76 and 627.54

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Solution

The fourth proportional to 1,781.82, 2,672.76 and 627.54 is: 941.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.82 : 2,672.76 = 627.54 : x
  2. Step 2: Convert to fraction form
    1,781.82/2,672.76 = 627.54/x
  3. Step 3: Cross multiply
    1,781.82x = 2,672.76 × 627.54
  4. Step 4: Simplify right side
    1,781.82x = 1,677,263.81
  5. Step 5: Solve for x
    x = 1,677,263.81/1,781.82
  6. Step 6: Final answer
    x = 941.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.